Implemented extra ClearFailureMechanismCalculationOutput which needs an enumerable of failure mechanisms to clear the output for, so we can specify scenario's which don't require all failure mechanism to clear the output. Related to Issue [WTI-1081] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@7877 5a3db67b-de53-47b5-99c8-a1c30a6650e2